docs: def render(self, context):
          """Output the content of the `PlaceholdeNode` as a template."""
          content = self.get_render_content(context)
          request = context.get('request')
          render_edit_tag = False
          if request and request.user.is_staff and request.COOKIES.get('enable_edit_mode'):
              render_edit_tag = True
  
          if not content:
              if not render_edit_tag:
                  return ''
              return self.edit_tag()
  
          if self.parsed:
              content = self.render_parsed(context, content)
  
          if self.as_varname is None:
              if not render_edit_tag:
                  return content
              return content + self.edit_tag()
          context[self.as_varname] = content
          return ''